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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SN1PEPF000397AE.mail.protection.outlook.com (10.167.248.52) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.451.8 via Frontend Transport; Fri, 18 Sep 2026 10:28:29 +0000 Received: from satlexmb08.amd.com (10.181.42.217) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Fri, 18 Sep 2026 05:28:28 -0500 Received: from [192.168.1.100] (10.180.168.240) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server id 15.2.2562.49 via Frontend Transport; Fri, 18 Sep 2026 05:28:27 -0500 Message-ID: <4eabf0cf-f239-4f51-829c-9c0dfe4658b3@amd.com> Date: Fri, 18 Sep 2026 15:58:26 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [patch 5/5] clocksource: Rewrite watchdog code completely To: Borislav Petkov CC: Thomas Gleixner , LKML , "Nayak, K Prateek" References: <20260123230651.688818373@kernel.org> <20260123231521.926490888@kernel.org> <20260309154317.GPaa7qlRzYcQY1dBU3@fat_crate.local> <87pl5are5q.ffs@tglx> <20260918055423.GCaqzSDxu2xBB-aXK0@fat_crate.local> Content-Language: en-US From: "Aithal, Srikanth" In-Reply-To: <20260918055423.GCaqzSDxu2xBB-aXK0@fat_crate.local> Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: b+f3F/pipVhgeQk4b507xmCfI5KRmSw1mTfX57oMwSooZJ13DW+da/oC+zRySthPfg7ZAbO68A2sr90keFQ7scF570P0A2Q6KXbSswvxrKjS84DiVs4U3F+UavyeZs9gsYZ3fjEsgncXw9+Ze83hiDunCxbStrFkpWgdvL2AXp1UzHc1xAJMb5F57w3I9PIrS7vhzh2z4ezq10SZaMhTOSVmDPgvIaEJ3hVAolJezZwSj3bOLJWAq/Ar3XeTcTf00jFdBBIj1zu/wuViBeK/xuTk4BsI+KTNnfjKOUmqlTKXLgx2WiQG5O1XXx7GSx7U/3ft02G605qVs3EVg+FTKJbcqm+8DOUmnnNVMtSN0NXPzqkDs4ZP8IhqI+G7+lPpjJXEqq+yYWajbCFx9SudGKlzUKaF8iLfyMnv7zddhVHm9cqAaJwmKtK7N3/LgTEB X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Sep 2026 10:28:29.0867 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4e8935b1-b971-4fa8-31df-08df156f94c6 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397AE.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6671 On 9/18/2026 11:24 AM, Borislav Petkov wrote: > On Fri, Sep 18, 2026 at 09:16:19AM +0530, Aithal, Srikanth wrote: >> We have been seeing intermittent early-boot guest hangs in our CI for some >> time. Guests stop making serial progress during the first few seconds after >> SMP bring-up - no panic, no oops, no other error messages the vm just hangs. > Please enable CONFIG_CSD_LOCK_WAIT_DEBUG and run it again. That might tell us > something more about what's going on. > > Thx. I recreated the issue with CONFIG_CSD_LOCK_WAIT_DEBUG=y / DEFAULT=y (with and without csdlock_debug=1) and still get no csd wait dumps.